Abstract: A method for determining cardiac tissue health based on a depolarization wave within an EGM is disclosed. The method includes computing a first derivative with respect to time (DV/DT) of the EGM, determining extrema for the first derivative, establishing a value DV/DTMIN based on the extrema and mapping the value DV/DTMIN to cardiac tissue.

Abstract: A method for generating an electro-anatomical map to represent an underlying metric associated with heart tissue it is provided. The method comprises receiving, by a mapping system, point cloud data collected for the underlying metric at various locations within the heart; generating, by the mapping system, a surface mesh to represent the geometry of a heart, said surface mesh comprising a plurality of mesh points arranged as a series of interconnected triangles, wherein each mesh point lies on the surface of the heart, and is generated based on the point cloud data; rendering the surface mesh in a viewer application, comprising coloring the mesh points in the surface mesh based on values of the underlying metric associated with each of the mesh points and a color scale; and allowing a user to dynamically adjust the color scale based on a histogram.